Evidence against Ryskin's model of cosmic acceleration

TL;DR

This paper evaluates Ryskin's model of cosmic acceleration against observational data, finding it inconsistent at high redshifts and thus not a viable alternative to the standard $$CDM model.

Contribution

The study provides a critical assessment of Ryskin's model, highlighting its limitations compared to the standard cosmological model across different redshift ranges.

Findings

Ryskin's model aligns with $$CDM at low redshift (z < 1)

Significant divergence from $$CDM predictions at high redshift (z > 1)

Ryskin's model is not a suitable substitute for the standard model

Abstract

In this paper I examine how well Ryskin's model of emergent cosmic acceleration fits several sets of cosmological observations. I find that while Ryskin's model is somewhat compatible with the standard model of cosmological acceleration ($\Lambda$CDM) for low redshift (z < 1) measurements, its predictions diverge considerably from those of the standard model for measurements made at high redshift (for which z > 1), and it is therefore not a compelling substitute for the standard model.